Have a 2012 chev 2500hd, shrt bed, diesel. 4wd z71. Looking at a 5th wheel 42ft with gvwr of 15500, Hitch wt 2060. A sandpiper 365saqb Anyone towing a similar size trailer with a similar vehicle? I have ran the numbers and unless I miscalculated it seems to work within the trucks ratings. But it is close. Any advice would be appreciated